A novel large deletion in the RYR1 gene in a Belgian family with late-onset and recessive core myopathy
January 25, 2015
A novel large deletion in the RYR1 gene in a Belgian family with late-onset and recessive core myopathy

Authors: Gauthier Remiche, Hazim Kadhim, Marc Abramowicz, Nicolas Mavroudakis, Nicole Monnier, Joël Lunardi

Overview

Read the full article here

We report a novel and particularly unusual type of mutation, namely, large deletion in the RYR1 gene, in a Belgian family with myopathy: Patients were found to be compound heterozygous and presented a clinico-pathological phenotype characterized by late-onset and recessive myopathy with cores. We depict the clinical, electrophysiological, pathological and molecular genetic characteristics of family members.

To date, large deletions in the RYR1 gene have been reported in only two cases. Both involved different mutations and, in sharp contrast to our cases, presented with a very early-onset, neonatal, and a very severe or lethal phenotype. Overview of reported clinico-pathologic phenotypes, also highlights the rarity of combined late-onset/recessive co-occurrence in this group of myopathies with cores. Finally, this report underlines the broadening spectrum in this group of myopathologic disorders and highlights the concept of ‘RYR1-associated/related core myopathies’.

Keywords: RYR1 gene; Core myopathy; Mutation; Deletion; Pathology; Central core disease

Close close
Donate
Newsletter Registration